D038 - Libraries and modules declare version 1, and they pack it differently

Status: decided, from a loader's own parser.

The identity values were emitted with version zero throughout. A loader builds its symbol lookup key from the version the module declares and matches it against the version the library was registered with, so a module claiming version zero against a library registered as version one matches nothing - and every symbol from it fails to resolve with no error anywhere, because as far as the loader is concerned it was asked for something that does not exist.

The two shapes are not the same, which is why there are now two functions rather than one with a comment:

	63-48	47-32	31-0
library	id	version (16 bits)	name offset
module	id	major (8) ‖ minor (8)	name offset

Honest about what this bought. It is what the loader's parser says, and the values we emit now match what it registers. It has not yet changed observed behaviour in either emulator: the one that runs the module resolved 928 imports before and after, and the other still does not bind. It is a correctness fix, not a demonstrated one.